The authors describe the fabrication and characterisation of 1.55 µm wavelength DFB lasers with integrated, etched lateral taper, spot size converters. The buried ridge structure lasers were fabricated by conventional two-stage growth and processing techniques. Typical threshold currents of 10–15 mA were achieved with output powers up to 25 mW at 100 mA drive and with high singlemode yield. Coupling efficiencies to singlemode fibre were ~40% with positional tolerances of approximately ±2 µm at the –1 dB power point.
1.55 µm DFB lasers incorporating etched lateral taper spot size converters
1998-04-16
2 pages
Aufsatz (Zeitschrift)
Englisch
processing techniques , distributed feedback lasers , buried ridge structure laser fabrication , 25 mW , coupling efficiencies , optical transmitters , DFB lasers , etched lateral taper spot size converters , output powers , integrated optics , spot size converters , two-stage growth , high singlemode yield , etching , etched lateral taper , 100 mA , 40 percent , infrared sources , positional tolerances , DFB laser diodes , optical fibre couplers , singlemode fibre coupling , 1.55 mum , diffraction gratings , threshold currents , 10 to 15 mA , optical fabrication , laser modes , laser transitions , semiconductor lasers
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